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logs.go
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logs.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cloudmock
import (
"context"
"net"
"strings"
"sync"
logpb "cloud.google.com/go/logging/apiv2/loggingpb"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
type LogsTestServer struct {
lis net.Listener
srv *grpc.Server
// Endpoint where the gRPC server is listening
Endpoint string
userAgent string
writeLogEntriesRequests []*logpb.WriteLogEntriesRequest
mu sync.Mutex
}
func (l *LogsTestServer) Shutdown() {
l.srv.GracefulStop()
}
func (l *LogsTestServer) Serve() {
//nolint:errcheck
l.srv.Serve(l.lis)
}
func (l *LogsTestServer) CreateWriteLogEntriesRequests() []*logpb.WriteLogEntriesRequest {
l.mu.Lock()
defer l.mu.Unlock()
reqs := l.writeLogEntriesRequests
l.writeLogEntriesRequests = nil
return reqs
}
// Pops out the UserAgent from the most recent CreateWriteLogEntries.
func (l *LogsTestServer) UserAgent() string {
l.mu.Lock()
defer l.mu.Unlock()
ua := l.userAgent
l.userAgent = ""
return ua
}
func (l *LogsTestServer) appendWriteLogEntriesRequest(ctx context.Context, req *logpb.WriteLogEntriesRequest) {
l.mu.Lock()
defer l.mu.Unlock()
l.writeLogEntriesRequests = append(l.writeLogEntriesRequests, req)
if md, ok := metadata.FromIncomingContext(ctx); ok {
l.userAgent = strings.Join(md.Get("User-Agent"), ";")
}
}
type fakeLoggingServiceServer struct {
logpb.UnimplementedLoggingServiceV2Server
logsTestServer *LogsTestServer
}
func (f *fakeLoggingServiceServer) WriteLogEntries(
ctx context.Context,
request *logpb.WriteLogEntriesRequest,
) (*logpb.WriteLogEntriesResponse, error) {
f.logsTestServer.appendWriteLogEntriesRequest(ctx, request)
return &logpb.WriteLogEntriesResponse{}, nil
}
func NewLoggingTestServer() (*LogsTestServer, error) {
srv := grpc.NewServer()
lis, err := net.Listen("tcp", "localhost:0")
if err != nil {
return nil, err
}
testServer := &LogsTestServer{
Endpoint: lis.Addr().String(),
lis: lis,
srv: srv,
}
logpb.RegisterLoggingServiceV2Server(
srv,
&fakeLoggingServiceServer{logsTestServer: testServer},
)
return testServer, nil
}